Petroleum pipe column online nondestructive testing device based on geomagnetic field

Abstract

The utility model belongs to the technical field of nondestructive testing, and particularly relates to a petroleum string online nondestructive testing device based on a geomagnetic field, which comprises a traveling mechanism and a detection coil, the traveling mechanism comprises two main fixing plates which are symmetrically distributed; the plurality of fixing rods are fixed on the main fixing plate, the fixing rods penetrate through the main fixing plate, and the detection coil is fixed on the fixing rods; turning over the big arm; the two mounting lugs with holes are symmetrically fixed to the free end of the large overturning arm; a roller; a driving mechanism; according to the utility model, the detection coil is installed through the walking mechanism, and the driving mechanism can drive the overturning large arm to overturn and adjust the inclination angle of the overturning large arm so as to adjust the position of the roller to adapt to petroleum pipe columns with different diameters and ensure that the detection coil and the petroleum pipe columns are coaxial, so that not only is the stability of the detection coil improved, but also the detection efficiency is improved. And the detection accuracy is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of non-destructive testing, and in particular relates to an online non-destructive testing device for a petroleum pipe based on the geomagnetic field. Background Art

[0002] Online non-destructive testing technology is often used to inspect metal pipelines such as oil pipes to detect metal loss in metal pipelines. There are five main types of non-destructive testing: X-ray testing, ultrasonic testing, liquid penetrant testing, magnetic particle testing, and eddy current testing.

[0003] Geomagnetic field detection is an eddy current detection technology that uses the geomagnetic field as a signal source. It uses the principle of electromagnetic induction to detect defects non-destructively by measuring the changes in induced eddy currents in the workpiece being inspected. The detection coil does not need to contact the workpiece and does not require a coupling agent.

[0004] In the prior art, when performing eddy current testing on metal pipes such as oil pipe strings, taking inner wall testing as an example, rollers are usually set around the periphery of the detection coil to facilitate the movement of the detection coil along the length of the metal pipe. However, this cannot adapt to metal pipes of different diameters, and it is difficult to ensure that the detection coil and the metal pipe are coaxial, which not only reduces the stability of the detection coil but also reduces the accuracy of the detection.

[0005] In order to solve the above problems, this application proposes an online non-destructive testing device for oil pipes based on the geomagnetic field. Utility Model Content

[0006] In order to solve the above problems existing in the prior art, the utility model provides an online non-destructive testing device for oil pipes based on the geomagnetic field, which has the characteristics of easy use, wide application range, high stability and high detection accuracy.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: an online nondestructive testing device for oil pipes based on the geomagnetic field, comprising a traveling mechanism and a detection coil, wherein the traveling mechanism drives the detection coil to move along the length direction of the oil pipe, and the traveling mechanism comprises:

[0008] Main fixing plates, wherein the two main fixing plates are symmetrically distributed;

[0009] Fixed rods, a plurality of the fixed rods are fixed on the main fixed plate, and the fixed rods pass through the main fixed plate, and the detection coil is fixed on the fixed rods;

[0010] A flip arm, wherein a plurality of flip arms are hingedly connected to the two main fixed plates and are evenly spaced along the circumferential direction;

[0011] Mounting ears with holes, two mounting ears with holes are symmetrically fixed to the free ends of the flip arm;

[0012] A roller, the roller being rotatably mounted between the two mounting ears with holes;

[0013] A driving mechanism is drivably connected to the flip arm and is used to drive the flip arm to flip.

[0014] As a preferred technical solution of the utility model, it also includes:

[0015] A fixing flange is fixed on the fixing rod, and the detection coil is fixed between the two fixing flanges.

[0016] As a preferred technical solution of the present invention, the driving mechanism includes:

[0017] a movable plate, the movable plate moving relative to the main fixed plate;

[0018] A flip arm, one end of which is hinged to the flip arm and the other end of which is hinged to the movable plate;

[0019] A threaded screw, the threaded screw being rotatably connected to the main fixed plate, and the threaded screw passing through the movable plate and being connected to the movable plate by screwing;

[0020] A number one drive motor is fixed on the main fixed plate and is used for driving the threaded screw to rotate.

[0021] As a preferred technical solution of the present invention, the driving mechanism further includes:

[0022] A driving gear, the driving gear being fixed on the threaded screw;

[0023] a transmission rod, the transmission rod being rotatably connected to the main fixing plates, and the two ends of the transmission rod respectively passing through the two main fixing plates;

[0024] A driven gear is fixed on the protruding end of the transmission rod and meshes with the driving gear.

[0025] As a preferred technical solution of the present invention, the fixing rod passes through the movable plate.

[0026] As a preferred technical solution of the utility model, it also includes:

[0027] A limiting plate is fixed to the end of the fixing rod.

[0028] As a preferred technical solution of the utility model, it also includes:

[0029] A No. 2 driving motor is fixed on the mounting ear with a hole and is used for driving the roller to rotate.

[0030] As a preferred technical solution of the present invention, the detection coil includes:

[0031] Ring permanent magnet;

[0032] T-shaped winding poles, a plurality of said T-shaped winding poles being fixed on the circumferential surface of said annular permanent magnet at equal intervals along the circumferential direction;

[0033] A copper wire coil is wound on the T-shaped winding post.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] In the utility model, the detection coil is installed through the walking mechanism, and the turning arm can be driven to turn through the driving mechanism, and the tilt angle of the turning arm can be adjusted to adjust the position of the roller to adapt to oil pipes of different diameters, thereby ensuring that the detection coil and the oil pipe are coaxial, thereby improving the stability of the detection coil and ensuring the accuracy of detection.

[0036] Other additional advantages and benefits of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0038] Figure 1 It is a structural diagram of the utility model;

[0039] Figure 2 This is a schematic diagram of the axonometric structure of the walking mechanism in the present utility model;

[0040] Figure 3 For this utility model Figure 2 Schematic diagram of the enlarged structure of the driving mechanism;

[0041] Figure 4 For this utility model Figure 2 A in the figure shows the enlarged structural diagram;

[0042] Figure 5 This is a schematic diagram of the axonometric structure of the detection coil in the present utility model.

[0043] In the figure: 1, walking mechanism; 11, main fixed plate; 12, fixed rod; 13, overturning large arm; 14, ear with hole installation; 15, roller; 16, moving plate; 17, overturning small arm; 18, fixed flange; 19, limiting plate; 2, detection coil; 21, annular permanent magnet; 22, T-shaped winding column; 23, copper wire coil; 3, driving mechanism; 31, threaded screw; 32, No. 1 driving motor; 33, driving gear; 34, transmission rod; 35, driven gear; 4, No. 2 driving motor. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0045] Please refer to Figures 1-5 The utility model provides the following technical scheme: an on-line nondestructive testing device for oil pipe column based on geomagnetic field, which comprises a walking mechanism 1 and a detection coil 2, the walking mechanism 1 drives the detection coil 2 to move along the length direction of the oil pipe column, and the walking mechanism 1 comprises a main fixed plate 11, a fixed rod 12, an overturning large arm 13, an ear with hole installation 14, a roller 15 and a driving mechanism 3.

[0046] Further, by Figure 1 and Figure 2As shown, in this embodiment, two main fixed plates 11 are symmetrically distributed, a plurality of fixed rods 12 are fixed on the main fixed plates 11, and the fixed rods 12 pass through the main fixed plates 11, the detection coil 2 is fixed on the fixed rods 12, and a plurality of flip arms 13 are hinged on the two main fixed plates 11 and are evenly spaced along the circumferential direction. Two mounting ears 14 with holes are symmetrically fixed to the free ends of the flip arms 13, and the roller 15 is rotatably installed between the two mounting ears with holes 14. The driving mechanism 3 is drivably connected to the flip arm 13 and is used to drive the flip arm 13 to flip. After adopting the above solution, when in use, the detection coil 2 is fixed on the fixed rod 12, and then the walking mechanism 1 is placed in the oil pipe string, and then started. The dynamic drive mechanism 3 drives the flip arm 13 to flip, causing the roller 15 to press against the inner wall of the oil pipe string, so that the walking mechanism 1 drives the detection coil 2 to move along the length direction of the oil pipe string, using the geomagnetic field as a signal source, cooperating with the detection coil 2 to generate induced eddy currents, and detecting defects non-destructively by measuring the changes in the induced eddy currents in the oil pipe string. The utility model installs the detection coil 2 through the walking mechanism 1, and can drive the flip arm 13 to flip through the drive mechanism 3, adjust the inclination angle of the flip arm 13 to adjust the position of the roller 15 to adapt to oil pipe strings of different diameters, ensure that the detection coil 2 is coaxial with the oil pipe string, improve the stability of the detection coil 2, and ensure the accuracy of detection.

[0047] It should be noted that eddy current non-destructive testing technology is one of the five conventional non-destructive testing methods. Its working principle is a well-known existing technology and will not be elaborated in this article.

[0048] Optionally, by Figures 1-3 As shown, in this embodiment, it also includes: a fixed flange 18, the fixed flange 18 is fixed on the fixed rod 12, and the detection coil 2 is fixed between the two fixed flanges 18. After adopting the above scheme, the utility model uses bolts and the fixed flange 18 to install the detection coil 2, which is easy to install and has high stability.

[0049] Optionally, by Figures 1-3As shown, in this embodiment, the driving mechanism 3 includes: a moving plate 16, a flip arm 17, a threaded screw 31 and a No. 1 driving motor 32. The moving plate 16 moves relative to the main fixed plate 11, one end of the flip arm 17 is hinged to the flip arm 13, and the other end is hinged to the moving plate 16. The threaded screw 31 is rotatably connected to the main fixed plate 11, and the threaded screw 31 passes through the moving plate 16 and is connected to the moving plate 16 by threaded screwing. The No. 1 driving motor 32 is fixed on the main fixed plate 11 to drive the threaded screw 31 to rotate. After adopting the above scheme, when in use, start the No. 1 driving motor 32 to drive the threaded screw 31 to rotate. Under the action of the threaded screwing, the moving plate 16 moves, and at the same time drives the flip arm 17 to flip and move. The flip arm 17 drives the flip arm 13 to flip, and adjusts the inclination angle of the flip arm 13 to adjust the position of the roller 15.

[0050] It should be noted that the above solution is only an exemplary solution of the present invention and is not intended to limit the present invention. In actual use, the threaded screw 31 can also be rotated manually, but the position of the roller 15 needs to be adjusted before the walking mechanism 1 is completely placed in the oil pipe string.

[0051] Preferably, by Figures 1-3 As shown, in this embodiment, the driving mechanism 3 also includes: a driving gear 33, a transmission rod 34 and a driven gear 35. The driving gear 33 is fixed on the threaded screw 31, and the transmission rod 34 is rotatably connected to the main fixed plate 11. The two ends of the transmission rod 34 respectively pass through the two main fixed plates 11. The driven gear 35 is fixed on the protruding end of the transmission rod 34 and meshes with the driving gear 33. After adopting the above scheme, when the No. 1 driving motor 32 drives the threaded screw 31 to rotate, it will drive the driving gear 33 to rotate. The driving gear 33 drives the driven gear 35 to rotate through the meshing action, causing the transmission rod 34 to rotate. The transmission rod 34 drives the driven gear 35 at the other end to rotate, and utilizes the meshing action between the driving gear 33 to drive the threaded screw 31 at the other end to rotate. The two threaded screws 31 rotate synchronously, and the rollers 15 at both ends are synchronously adjusted. Only one No. 1 driving motor 32 is required, and it has a centering effect to ensure that the detection coil 2 is coaxial with the oil pipe string.

[0052] Preferably, by Figures 1-3 As shown, in this embodiment, the fixing rod 12 passes through the movable plate 16 to guide the movable plate 16 and improve the stability of the movable plate 16 .

[0053] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, a limit plate 19 is further included. The limit plate 19 is fixed to the end of the fixing rod 12 and is used to limit the moving range of the movable plate 16 .

[0054] Preferably, by Figure 1 、 Figure 2 and Figure 4 As shown, this embodiment also includes: a No. 2 drive motor 4, which is fixed on the mounting ear 14 with a hole and is used to drive the roller 15 to rotate. After adopting the above scheme, when in use, the No. 2 drive motor 4 is used to drive the roller 15 to rotate, so that the walking mechanism 1 automatically drives the detection coil 2 to move.

[0055] It should be noted that the above solution is only an exemplary solution of the present invention and is not intended to limit the present invention. In actual use, a traction rope may be used to pull the walking mechanism 1 to move in the oil pipe string.

[0056] Optionally, by Figure 1 and Figure 5 As shown, in this embodiment, the detection coil 2 includes: an annular permanent magnet 21, a T-shaped winding post 22, and a copper wire coil 23. A plurality of T-shaped winding posts 22 are fixed to the circumferential surface of the annular permanent magnet 21 at equal intervals along the circumferential direction, and the copper wire coil 23 is wound around the T-shaped winding post 22. After adopting the above solution, when in use, the earth's magnetic field is used as a signal source, and the detection coil 2 is used to generate induced eddy currents. By measuring the changes in the induced eddy currents in the oil pipe string, defects can be non-destructively discovered.

[0057] It should be noted that the detection coil 2, the No. 1 drive motor 32 and the No. 2 drive motor 4 are all conventional equipment purchased on the market. Those skilled in the art can make conventional selections according to usage needs. Their working principles are common knowledge known to those skilled in the art and have been fully disclosed by the existing technology, so they will not be elaborated in this article.

[0058] The circuit connection involved in the present invention is a common means used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments, and it belongs to the widely used existing technology.

[0059] Components not described in detail herein are prior art.

[0060] The working principle and use process of the present invention are as follows: When using the nondestructive testing device of the present invention, the detection coil 2 is fixed on the fixed rod 12, and then the walking mechanism 1 is placed in the oil pipe string. Then, the No. 1 driving motor 32 is started to drive the threaded screw 31 to rotate. Under the action of the thread rotation, the moving plate 16 moves, and at the same time drives the flip arm 17 to flip and move. The flip arm 17 drives the flip arm 13 to flip, and the tilt angle of the flip arm 13 is adjusted to adjust the position of the roller 15 so that the roller 15 is against the inner wall of the oil pipe string;

[0061] When the first drive motor 32 drives the threaded screw 31 to rotate, it drives the driving gear 33 to rotate. The driving gear 33 drives the driven gear 35 to rotate through meshing, which causes the transmission rod 34 to rotate. The transmission rod 34 drives the driven gear 35 at the other end to rotate, and uses the meshing effect between the transmission rod 34 and the driving gear 33 to drive the threaded screw 31 at the other end to rotate. The two threaded screws 31 rotate synchronously, and the rollers 15 at both ends are adjusted synchronously.

[0062] The second drive motor 4 drives the roller 15 to rotate, causing the traveling mechanism 1 to automatically drive the detection coil 2 to move along the length of the oil pipe. The earth's magnetic field is used as a signal source, and the detection coil 2 generates induced eddy currents. By measuring the changes in the induced eddy currents in the oil pipe, defects can be non-destructively detected.

[0063] The utility model installs the detection coil 2 through the walking mechanism 1, and can drive the flip arm 13 to flip through the driving mechanism 3, and adjust the inclination angle of the flip arm 13 to adjust the position of the roller 15 to adapt to oil pipes of different diameters, ensure that the detection coil 2 is coaxial with the oil pipe, thereby improving the stability of the detection coil 2 and ensuring the accuracy of detection.

[0064] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An online nondestructive testing device for oil pipes based on the geomagnetic field, comprising a traveling mechanism (1) and a detection coil (2), wherein the traveling mechanism (1) drives the detection coil (2) to move along the length direction of the oil pipe, and is characterized in that: The walking mechanism (1) comprises: A main fixing plate (11), wherein the two main fixing plates (11) are symmetrically distributed; Fixed rods (12), a plurality of the fixed rods (12) are fixed on the main fixed plate (11), and the fixed rods (12) pass through the main fixed plate (11), and the detection coil (2) is fixed on the fixed rods (12); A flip arm (13), wherein a plurality of flip arms (13) are hingedly connected to the two main fixed plates (11) and are evenly spaced along the circumferential direction; Mounting ears (14) with holes, two mounting ears (14) with holes are symmetrically fixed to the free ends of the flip arm (13); A roller (15), the roller (15) being rotatably mounted between the two mounting ears (14) with holes; A driving mechanism (3) is drivably connected to the flip arm (13) and is used to drive the flip arm (13) to flip.

2. The on-line nondestructive testing device for oil pipes based on the geomagnetic field according to claim 1, characterized in that: Also includes: A fixing flange (18) is fixed on the fixing rod (12), and the detection coil (2) is fixed between the two fixing flanges (18).

3. The on-line nondestructive testing device for oil pipes based on the geomagnetic field according to claim 1, characterized in that: The driving mechanism (3) comprises: a movable plate (16), wherein the movable plate (16) moves relative to the main fixed plate (11); A flip arm (17), one end of the flip arm (17) is hinged to the flip arm (13), and the other end is hinged to the movable plate (16); a threaded screw (31), the threaded screw (31) being rotatably connected to the main fixed plate (11), and the threaded screw (31) passing through the movable plate (16) and being connected to the movable plate (16) by screwing; A number one driving motor (32), the number one driving motor (32) being fixed on the main fixing plate (11) and being used for driving the threaded screw (31) to rotate.

4. The on-line nondestructive testing device for oil pipes based on the geomagnetic field according to claim 3, characterized in that: The driving mechanism (3) further comprises: A driving gear (33), wherein the driving gear (33) is fixed on the threaded screw (31); A transmission rod (34), the transmission rod (34) is rotatably connected to the main fixed plate (11), and two ends of the transmission rod (34) respectively pass through the two main fixed plates (11); A driven gear (35) is fixed on the protruding end of the transmission rod (34) and meshes with the driving gear (33).

5. The on-line nondestructive testing device for oil pipes based on the geomagnetic field according to claim 3, characterized in that: The fixing rod (12) passes through the moving plate (16).

6. The on-line nondestructive testing device for oil pipes based on the geomagnetic field according to claim 1, characterized in that: Also includes: A limiting plate (19), wherein the limiting plate (19) is fixed to the end of the fixing rod (12).

7. The on-line nondestructive testing device for oil pipes based on the geomagnetic field according to claim 1, characterized in that: Also includes: A second drive motor (4) is fixed on the mounting ear (14) with a hole and is used to drive the roller (15) to rotate.

8. The on-line nondestructive testing device for oil pipes based on the geomagnetic field according to claim 1, characterized in that: The detection coil (2) comprises: annular permanent magnet (21); T-shaped winding poles (22), wherein a plurality of the T-shaped winding poles (22) are fixed on the circumferential surface of the annular permanent magnet (21) at equal intervals along the circumferential direction; A copper wire coil (23) is wound on the T-shaped winding post (22).

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